Answer
KNO$_3$ does not have a common ion with HNO$_2$.
Work Step by Step
HNO$_2$ will ionize less when it has a common ion with one of the solutions given.
Chemistry: A Molecular Approach (3rd Edition)
by Tro, Nivaldo J.
Published by
Prentice Hall
ISBN 10:
0321809246
ISBN 13:
978-0-32180-924-7
Chapter 16 - Sections 16.1-16.8 - Exercises - Problems by Topic - Page 803: 27b
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